Historical
MSS SP-43-2013
Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications
This Standard Practice provides dimensions, tolerances, and markings for butt-welding fittings for low pressure, corrosion resistant applications.
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Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. [mss]
